Peak expiratory flow meter



FIG. 1 is a top and side perspective view of a peak expiratory flow meter, showing my new design;

FIG. 2 is a side view thereof;

FIG. 3 is a side view thereof rotated 90 degrees about the length axis from the view of FIG. 2;

FIG. 4 is a rear view thereof; and,

FIG. 5 is a front view thereof. 

The ornamental design for a peak expiratory flow meter, as shown and described. 